Switec X27.168 Breakout Board v1.1 - Update

it works. i would do a comparison but i only have one of these motors and had to desolder it from the original board. used the example code SwitecX25 library by clearwater to get things moving as i couldn't find any code from 2017.

 

v1.1 shared on oshpark here. uses Fairchild/ON Semiconductor 1N4148 diodes, digi-key 1N4148FSCT-ND. 

 

ffmpeg -i input.mov -vf "fps=10,scale=640:-1:flags=lanczos" -gifflags -transdiff output.gif
 

steeereo

steeereo is an amplified, 3-way stereo splitter designed for use on road trips when i don't want to listen to the kids' movie. previously, we had to crank the car stereo for the little one in the very back of the car to hear the audio. it doesn't use much power. i was hoping to use a USB battery bank but they switch off automatically when the load is too small. my goal for this project was sanity in the car and getting it done in under two weeks.

• powered by USB 5V
• uses 3x MAX4410 dev boards from aliexpress
• LED power indicator
• independent volume control
• #6-32 hardware (M3 compatible?) and McMaster 93365A130 heat-set inserts
• 0.2A PTC fuse

all the inputs are tied together and then tied to the 3.5mm audio cable. the USB cable only supplies +5V and ground to each board, no data. 

if i were to make this again, i'd prob add some tvs protection, a power switch and removable cords. 

 

 

 

   

Switec X27.168 Breakout Board v1.1

many years ago, it was brought to my attention that the Switec X27.168 Breakout Board v1 design did not make sense. this feedback was seen as absurd since the board worked perfectly (things moved, didn't they?) and because i'd been designing very compact, robust (read very small and very simple) pcb's for months at that point i was sure these observations weren't worth a second glance. fast forward eight years ... still designing pcb's and i now question everything and have a solid grasp on imposter syndrome. i'm not sure where i am on this graph but i could be somewhere in the shadow of "Mount Stupid". 

"Dunning–Kruger Effect 01.svg" by 忍者猫, CC0 1.0 Universal Public Domain Dedication, source. 

so here's v1.1 shared on oshpark here. i'll update when i've tested it. still uses Fairchild/ON Semiconductor 1N4148 diodes.

ps - thank you for the feedback.

Little Stick Vise, Part 2

Custom jaws for the little stick vises. They get a lot of use. I generally keep the blue or purple jaws on one set and the wide, orange jaws on the other. I generally print my own jaws now but for some weird geometries I'll revert to SLS from the usual sources like Shapeways or JLC3DP.

 

A complete ripoff of the original stick vise by Alex Rich. Files shared here.

Switec X27.168 Breakout Board

Update: see post about updated design here.

Original Post:
Yet another breakout board for a Switec X27.168 stepper motor. It's just like the others except it's round! The board is tested and functions. It uses Fairchild/ON Semiconductor 1N4148 diode to protect the microcontroller.